In blasting-cartridges



F. W. SMITH & F. EGGE.

BLAS'I'ING-CARTRIDGE.

Patented Nov. 30,1875.

WITNESSES T Dc Zia/L;

flttarneym FRIEND W. SMITH AND FREDRICK EGGE, OF BRIDGEPORT, CONNECTICUT.

v IMPROVEMENT IN BLASTING-CARTRIDGES.

Specification forming part of Letters Patent No. B70 60), dated November 30, 1875; application filed November 18, 1875.

thereon, making a part of this specification.

()nr invention relates to cartridges for holding powder for blasting purposes; and it consistsin the construction of the same, as hereinafter more fully set forth.

In order to enable others skilled in the art to which our invention appertains to make and use the same, we will now proceed to describe.

its construction and operation, referring to the annexed drawings, in which- Figure l is a side elevation of the cartridge with the lower end broken away, showing its interior. Fig. 2is a'perspective View of the lower end of the cartridge, with the material partially folded over the interior cup.

A represents a tube made of paper, muslin, or similar light and cheap materiaL- This tube is made-slightly tapering in form, the bottom being smaller than the top.. B represents a metallic cup, which is made to neatly fit the tube, and is by a suitable in strument forced down into the same, so that when at or near .thebottoni of the same it will be tightly held in place, and forms the bottom of the cartridge. We prefer to leave the material of which the tube is made CASE A.

to extend slightly below the. bottom of the cup, as shown atb in Fig. 1, and then carefully fold the material over the bottom of the cup, and there cement or glue the same flat, so as to prevent the end of the tube from becoming torn or separated from the cup when in ,the act of inserting it in the blasting. orifice. 'The tube itself may be made'iinpervious to water by any of the wellknown processes.

Thecup may be made of other material than metal, such as hard rubber, papiermach, leather, wood, or anythingthat will have suflicient rigidity.

A patent for a blasting-cartridge is known in which the tube has both an interior and an exterior cup at the end; but we have discovcred that a single cup on the interior, when the tube is made on a taper, is sufficient for all ordinary uses, and is less expensive in construction.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-- A blasting-cartridge, made of flexible material in tapering form, having an interior cup of rigid material forced down into the same, substantially as set forth.

In testimony that we claim the foregoing we have hereunto set our hands this 29th day of October, 1875.

FRIEND W. SMITH- FREDRICK EGGE. Witnesses:

O. L. EVERT, WM. E. Drsneow. 

